Migration: SDK Reference files from old repositories

[ben-fornefeld]

Note

Low Risk
Appears to be a documentation-only migration of SDK reference content; low risk aside from potential broken links or navigation/config drift if paths changed.

Overview
Migrates SDK reference documentation files from older repositories into this docs repo, consolidating reference content in one place.

Likely updates the docs structure/navigation to point at the newly added reference pages and ensure the migrated content builds and links correctly.

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